Rhino RGB
8-bit RGB PNG
rhino-rgb.png- Dimensions
- 900 x 1200
- Size
- 1.4 MB
- MIME type
- image/png
SHA-256 checksum
dffbb76a0ab6d56b0d959a592ebf77b7e1ce9298188f010627f5b7b773be4ad4Developer test assets
Sample PNG files for testing
PNG fixtures covering RGB, grayscale, 16-bit RGB and grayscale, Adam7 interlacing, indexed colour, alpha transparency, and a 1 x 1 edge case.
Download individual files
Zebra grayscale
8-bit grayscale PNG
zebra-grayscale.png- Dimensions
- 900 x 1200
- Size
- 705.4 KB
- MIME type
- image/png
SHA-256 checksum
0486b913b20b5619f4add4805538d12362f8bc1df4f8cf9a728f227753215c67
Zebra 16-bit grayscale
16-bit grayscale PNG
zebra-16-bit-grayscale.png- Dimensions
- 1200 x 1600
- Size
- 3.2 MB
- MIME type
- image/png
SHA-256 checksum
e142fd71deec316f4a952cd09b96563ae9adb31ed44eda3443cbff37facb16aa
Coastal transparency
8-bit RGBA transparency
coast-alpha.png- Dimensions
- 800 x 600
- Size
- 549.5 KB
- MIME type
- image/png
SHA-256 checksum
1e11be5e7d597b36ea5626204ef3be241492122985b72af501b4042054414206
Indexed aerial coast
8-bit palette with 256 entries
aerial-coast-indexed.png- Dimensions
- 640 x 480
- Size
- 234.2 KB
- MIME type
- image/png
SHA-256 checksum
8048405ea011c6b6f04a62e4eb78f789cb4511dd1eda7ed19003afa010f64686
Transparent pixel
Fully transparent RGBA pixel
transparent-1x1.png- Dimensions
- 1 x 1
- Size
- 70 bytes
- MIME type
- image/png
SHA-256 checksum
c2153f77e11087fcb078ae38527fa83bef29791e3700e30cc87fec4405a66d0f
Interlaced rocky coast
Seven-pass Adam7 interlacing
rocky-coast-interlaced.png- Dimensions
- 640 x 480
- Size
- 670.3 KB
- MIME type
- image/png
SHA-256 checksum
e49835ffa6449dd51bc8a9de87e8162af0b2cc840c17cce11eb6c0b69f79e41d
16-bit coastline
16 bits per RGB channel
coastline-16-bit-rgb.png- Dimensions
- 800 x 600
- Size
- 2.1 MB
- MIME type
- image/png
SHA-256 checksum
8b8a3ac39a0048cbcbbe7ed30bf9b2934a8621788eb078f5eb4ba8ac22fee733
Pixel-accurate fixtures
Test channels and bit depth
PNG is dependable, but image pipelines still flatten transparency, reduce 16-bit data to 8-bit, or incorrectly treat grayscale images as RGB.
RGB
Confirm ordinary full-colour decoding and conversion.
Grayscale
Detect unwanted channel expansion or tonal changes.
RGBA
Verify transparency survives resizing and export.
Indexed
Exercise palette lookup and low-colour processing paths.
Adam7
Test progressive seven-pass decoding.
PNG testing questions
Why does transparency become black?
The alpha channel may have been discarded or composited against black during conversion. Inspect intermediate outputs as well as the final image.
Why test 16-bit grayscale?
Scientific, medical, and editing workflows may depend on tonal precision that an automatic 8-bit conversion removes.
Fixture integrity
Verified properties, not renamed files
Each PNG download is inspected as binary image data. Dimensions, file size, MIME type, format-specific properties, and the published SHA-256 checksum are checked after generation.
- ✓ PNG signature and colour type
- ✓ 8-bit and 16-bit samples
- ✓ Adam7 interlace flag
- ✓ Palette and alpha data
Need a different output? Browse PNG conversion tools.
What this collection tests
- ✓RGB and grayscale decoding
- ✓16-bit samples
- ✓Adam7 interlacing
- ✓indexed colour
- ✓RGBA transparency
- ✓minimum dimensions
Use in automated tests
Every file has a stable direct URL and SHA-256 checksum, making it suitable for upload fixtures, decoder tests, CI pipelines, and documentation.
curl -O https://crestconvert.com/test-files/png/rhino-rgb.png